While I was riding yesterday, I got to thinking about wind noise and how it interferes with hearing the rest of the ambient sounds.
It would seem to be pretty simple to reduce it- just holding a finger vertically in front of your ear and in contact with your head makes a dramatic improvement.
I have found references to a product that attaches to the helmet strap, but it apparently is no longer available, so I'm thinking about fabricating something simple out of minicell foam.
If anyone has experimented along these lines, I'd love to hear what you came up with- save me some R&D!
Thanks!